Need help with destroying 2d gameobject with raycast2d C#

Im trying to figure out how to destroy gameobject(ball) with other gameobject(ant) on mouseclick. I have 2 objects and both have Rigidbody 2d + Circe collider 2d. This script is attached to gameobject(ant)

this destroys object even im not clicking it on top of the ant gameobject so it destroys from everywhere i click.

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class DestroyOnClicked : MonoBehaviour {
5.  
6.     public GameObject ant;
7.  
8.     void FixedUpdate ()
9.     {
10.         if (Input.GetMouseButtonDown(0))
11.         {
12.             RaycastHit2D hit = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero);
13.            
14.             if(hit.collider != null)
15.             {
16.                 if(hit.collider == gameObject.collider2D);
17.                 {
18.                     Destroy(gameObject);
19.                 }
20.             }
21.         }
22.     }
23. }
24.  

 

ok i found solution. I removed collider from ball and ant changed to is trigger